Suppose that X is a random variable with mean 10 and standard deviation 2, and Y is a random variable with mean 5 and standard deviation 1. X and Y are independent. Let Z = X + 3Y. What is mean of Z?

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%